You'll need to explain more fully what you are trying to do, starting with how you are creating the docx files, where docx4j fits in, the role of PDF, and what you "have to use" Office for. If docx4j is running on a server, why can't you run LibreOffice there as well?

i am sorry for little inconvincy. I am working on a project a desktop application of docx to pdf converter in which client need this converter on MS Office2007 . In project we browse on docx file and then we generate the equivalent PDF. so i need solution on Ms office2007. i'll wait for ur response

I just deleted your latest post - your 3rd post on a topic asking for WordArt support in PDF output - as it added nothing to what you had already posted, and as such amounted to spam.

I have already responded indicating docx4j does not support it at this time. In the absence of existing support, you can either add it yourself, offer to pay someone to add it for you, find some alternative solution, or wait (feel free to ask again in 3 months say).